Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc61d107a2dd28e…

MALICIOUS

PDF

39.1 KB Created: 2021-07-06 02:16:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 334b1c5baa27ebd2d518e08fee00485e SHA-1: 09a566e531c680d6e629522afee1c0bb852a6466 SHA-256: edc61d107a2dd28e9f631ef3cb33d6db623d78c815d72d90998260c3cfae5548
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF repositories. The primary URL, http://netcdn.tw/app/431946152/where-to-get-free-robux-game-hack, along with the document body's reference to 'free Robux', indicates a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/where-to-get-free-robux-game-hack
    • https://pasca.unisba.ac.id/elibrary/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/wurst-hacks_GM479516143.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-games-free-online-to-play_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-jailbreak-money-hack-cheat-engine_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-robux-hack-generator-no-survey-tool_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-toy-codes-not-used_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/como-ser-hacker-en-roblox-jailbreak-2021_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-tycoons-free_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/csrb-roblox-cheats_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-vip-shirt-roblox_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-stuff-codes_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/dragon-balll-rage-roblox-hack_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-accounts-made-in-2021_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spins-coins_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-only-username-needed_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-clothes-on-roblox-hack_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/hacking-roblox-dll_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/cookie-hack-roblox-players_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004197.bin
aad8d0a34cdf28a06b4d3eb945e13b2608b6578ed4144d5d053eb2b89aa7f9dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4197 22568 bytes
font_01_sfnt_off000073e1.bin
e942b93b228ea09a2b9b89b185e62feaf889c583a2152a741a620a9da1dbb754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 19184 bytes

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